everett



E. A. EVERETT. MEANS FOR FOCUSNG LAMPS. APPLICATION FILEDI JULY l, 1918.

VjUNI'lEl) STAWENT OFF-ICE EDWARD a. isvnnnrr, or :new Yoan; it. fr. y

Means 'roar-cousine murs.

taureau.

To all whom may concern:

Beit known that I, EDWARD A. EVEREH,

of 123 Liberty St., NewYork, in the county of New York and' State of NewYork, have invented a certain new and useful Meansfor Focusing Lamps, ofwhich-the following is lre a specification. j

This invention relates to lamps. in whichv a source of light-isprojected through a lens and more particularly to ameans for-adjustingsaid light with relation to the lens.

leo

tion,'on the line o-p .of Fig. 1; Fig. 3, illusvtrates the principle ofthe adjustment'and Ll, is a detail of one of the" parts.

Fi j ne of the V'uses to which this invention isv applied is toilluminate railway signals.

These signals are lighted electrically froma low voltage battery E, andfor reasons of economy in vbattery consumption, the amount ofillumination is necessarily limited. lin

order to obtain proper illumination through the lens it is necessarythat the li ht beacoufra-tely focused sothat the marlmuln edect 'may Ybe obtained from. it. `Lamps are Vte changed from time to time and thecenter of v the light may, in consequence, varyhenoe;a

-convenientmethod of adjustment is essen-` tial. This in ventnrn,` in asimple manner.,`

providesfor minutely and independently adY justin 'the' lightin"alhorizontal@andiver-" y f' ycomposed of ordinary apparatusucompare-- I.tively inexpensive means of adjusting. a

tical p ane.

lin the drawingspttis the base of thelarnp, v

preferably of insulating material;v B isa 'supportingpiece C ydesignatee the lamp con# which, by 'means of the wing nut 12 clamps' sismg of an ordinary commercial socket 2t supporting an electric bulb 17.11 is a bolt the supporting pieceB tojthebase through ,theslotopening'l3. 1t is a circularopening in the end of B through Whichthetubular stem .15 of the lamp socket p2t is loosely placedand held inposition by theadjusting nuts 16. 13 i-s the center of illumination orfilament.; i,19 is'the terminals to which the battery wires 23, 29connect and from'which Athe insulated derible conductors 20 and 2tadjustment made.

i' Specification of'Lette'rs Batentf Patented Julie 24, 1919. Applianceinea July r, una. j semi No. 242,899.

are ledinto :the hollow lamp. stem 15. Theseb v wires are'placed withina groove 22 in the a citizen of the United States, and resident `loaseA.

outline on the drawings. 31 is the lens, 51

is the case, 52 is a shield for the lens and 53 is a door which `exposesan opening in the case extending from 54 to 55; Through this openingthe. lamp must be inserted'a-nd the When the Wingnut 12 13.3v t thesaine time the lamp may be and is v.engag'red bythe ,stem `15 of thesocket which the lamp may, move .in a horizontal j j j is released itis. apparent thatthe lampd may be moved to the r1 'ht or left, Fig. i1,by means of the slot `-ifnovedatyright angles onth'e holt l1 as a'pivotJfY The eitent of these movements ,is limitedby` the size'and.shape of the opening..

@5315 inthe base, which, in'this case is circular.

24..= .It will be found lthatthe area'through pla-neis representedby thecontour shown at.

whichjcanbeadjusted to raise vor lower it ;V

' 3 2,.`Fig.l3, T'hevertical position 4of the la-l i ment is "determinedby the clamping nuts 16l this adjustment may be represented by therectangle 33, Fig.l 3. lln this Way every pos` .sible adjustmentnecessary to bring the light into the focus of the lens is provided for.

' Attention is called to the fact that these adjustmentsare made withoutdisturbing the electrical connections in any way. This is an importantfeature since the adjustment 4must be made while the lamp is lighted. To

facilitate adjustment the adjusting nut is `-placed toward the openingin the case `whichV is comparatively small. The limited swing' of-thelarnp prevents thesupporting piece B making a short circuit withelther of the ter-4 minalsltt. -As this' arrangement is largely lamp isprovided that may be used for any pu ose.l

claim: 'v i 1. ln combination, a.` lens, an electrically.7

lighted lamp.,` a supporting piecefor saidy lamp, aninsulated base'block to'whichjsaid block forlimiting its positionlhorizontally.

' aving thusf described my invention, I

i 2. In combination, a lens a lamp, a. heavy slotted supporting piece Bfor said lamp .supported on one-end, an insulated base to Which saidsupporting piece is pivotally secured, an opening in said base arrangedtov K engage. with a. partof said lamp, Aand means a screw stem, aninsulated base with anaperture, a slotted supporting piece clamped tosaid base and capable of moving horizony of ,im A. D.

tall `thereover, said screw stem clamped to sai supporting piece -by anadjusting nut on each side of .said supporting piece, and l15 theaperture in said base arranged to limit saidhorizontal motion.

Signed at New York lin the county of New York and State of New York this21th day 1918.v Y i y p EDWARD A. EVERETT. Witnesses: Y` HOWARDH.,FI`.ET0HER,

'JAMES P. MACK.-

